Ford - Explorer :: 2004 - No Heat / Not Getting Vacuum To Call For Coolant To Enter Heater Core
Aug 7, 2014
I bought a 04 explorer with a bad thermostat which led to a bad head gasket, fixed that and managed to not have to buy the special tools or time it , but now that its running I don't have any heat. I have complete service records on this vehicle and there was never a complaint of the heater not working. The a/c works and the heat will adjust the a/c temp, but no heat. In trouble shooting it I found that I am not getting vacuum to call for the coolant to enter the heater core. When I apply suction to it, it will send the coolant. Even though I wasn't getting the clicking noise, I pulled the blend door actuator and it looks surprisingly good (not looking forward to putting it back in). Where to look next?
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I have an '04 Explorer Limited and lately only blows cold air. I've read about the blend door motors but it's been too cold in MI to want to do much--so the truck sits.
When I was troubleshooting the problem I found that I'm not getting any vacuum signal to the heater valve in the coolant line. Before I contemplate removing the console & doing surgery on my dash I'd like to know for sure what position the valve should be in when heat is called for.
All the other vacuum actuators seem to be working normally and there's no disconnected hoses under the dash; and no leaks. Coolant reservoir is full.
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2000 Expedition. Had ford mechanic replace front heater core due to not having heat in the front and back. wife brings it home I check all vents and notice there's good heat up front but not the back, then I switch the rear from panel to floor heat and hear a thumping sound (figure the blend door is doing it) still no heat in rear. returned to ford mechanic and they stated my blender door switch is not working properly, so they flushed out rear core and instead of fixing the blender door switch they kept it on floor position and charged me another bill. could it be possible that while replacing front core the gunk made it to the rear hoses and core, and clogged it up, and damaged the blender door switch somehow. prior to my heat issues I never had any problems with the rear blender door, just no heat due to front core needing replaced according to them "FORD".
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the only thing that is left to replace would be the radiator?my truck is a 1994 f150 and it is not overheating!i get lukewarm heat only on the highway,everywhere else it is cold air!!this new england weather is killing me
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I cant find my original post but I am reporting back on a low heat output issue. Not the climate door. It was the heater core clogging up. Instead of replacing, this is what I did. Purchased a "drill pump" and some clear hose and some CLR. Cut both the heater hoses,taking consideration of where best to install "T" connectors.
While hoses disconnected,filled heater core with CLR(as much as I could get in it). Hooked clear hose,drill pump configuration,on to the heater hoses. Ran drill pump in both directions for several minutes and stopping and letting it sit for a few minutes.
About 1 hour all together. Pieces of debris came out of the heater core and I could see it through the clear hose. Flushed the heater core out. Installed "T" connectors and it is heating very well now.
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with a new heater core, new blower motor, and new resistor and no heat, what would be the problem? gonna check the thermostat tomorrow.
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I have a 2010 GMC 3500 Savanah van with 6.0 motor. No heat in van. Engine operating temp is normal. Heater hose into core is hot. Hose coming out is barely warm. I am of course hoping for another explanation other then blocked heater core. The truck only has 45k miles. I am ready to backflush , but wondering if there can be any other explanation. A/C works normal.
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I just finished the replacement of my injector cups and I replaced every hose on that engine and when i replaced the heater hoses I believe I hooked them up right but just want to make sure. Is there an IN and and OUT on the heater core or does it not matter???? Im only asking simply because my legs feel like their on fire. Im wondering if the hot coolant is flowing through with out demanding it. I havent drove the truck in a while so Im questioning everything.
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Okay, the vehicle is a 1988 E250 ClubWagon 7.3 IDI diesel with front and rear AC/heat. I have 3 questions for you:
1. I found that the rear heater core is getting coolant flow constantly which is making my rear AC blow 75* air. These models don't have a blend door in the back, they appear to have a valve that is only allows coolant flow to the rear heater core when the heat is turned on. Problem is that I can't seem to find where this valve is located on the van or what it is called to locate it at a parts store. Where on my van this valve is located?
2. My rear blower only functions on High. I know there is a resistor set up in the rear that controls the blower speed. Before I just replace this, is there a way that I can test it?
3. Is it possible that the Resistor setup for the rear fan speed would also be causing the rear coolant flow valve to not work? I know it's a long shot, but does the valve signal flow through it when the AC is on to tell the coolant valve to shut?
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My jeep heater continues to have sand like sediment cloging the heater core, even after many flushes and replacing the heater core and the radiator. the mechanic says this will probably continue unless I replace the engine.
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I just flushed my coolant. Now I got more water than coolant, and in the heater core! I got some 50/50 coolant, cause cannot find 100% Asian coolant.
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I have a leak where my heater core tube goes into the intake at the rear pass side of engine. I have read that this part is pressed in. I dont want to remove the intake since i just paid $400 to have a new gasket kit put on. My question is can I bypass this tube with a hose from the water pump like in this video?
FORD 4.6 , 5.4 , 6.8, HEATER HOSE UNDER INTAKE REPLACEMENT THE EASY WAY !!! - YouTube....
If I can do a rubber hose like in the video I was to make sure that the tube just goes through the intake and that it does not supple coolant into the intake??
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The problem started when his heater core was leaking coolant and it dripped all the way down to his original ECU. Car stopped working. Then he went to a Hyundai dealer to fix the problem but they said he had to buy a brand new one. First ECU didn't work. Returned it and bought one more expensive. Dad told me it worked but he didn't by pass the heater core so coolant dripped again. So now I'm on my third ECU but it doesn't work. I've read online that some older cars have plug-and-play type of ECUs that aren't restricted to the VINs. His car is a 2004 Hyundai Santa Fe GLS FWD 4dr 3.5L.
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Plastic coupling between core and hose, is there a specialty to needed to remove from heater core?
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I've got my dash pulled apart but am unclear as to what I need to do with my steering wheel. I've got a 2007 F150 manual that says "remove steering column pinch bolt" along with a warning about not allowing the steering column shaft to rotate once the bolt is out. I believe I have identified the bolt (sits a few inches away from the steering shaft's u-joint on the side facing the driver -?).
How do I ensure the shaft doesn't rotate? Do I need to make the wheel lock before removing the bolt? Will the steering column drop down thereby allowing the dash to be pulled away from the firewall or do I need to remove additional bolts?
I saw this video : F150 Heater Core part 1 - YouTube
For 98 F150, but the differences in design are throwing me off a bit.
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I've checked just about everything, coolant level is good, engine gets hot, heater control valves moves, blend air door moves, the heater hoses don't feel as hot as I think they should, but the gauge reads in the middle, I burped it thoroughly and still no heat , blower works i actually can switch the blend air door manually, but no change! what am i missing? t-stat was changed too. 2001 sport trac....
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I have a 08 f-150 with a 5.4. Started smelling anti-freeze in the cab, with that classic windshield haze of a leaking heater core. I don't have anything on the floor, nor is the engine heating up. Temp gauge is where it always is. This doesn't smell all the time.I just drove 4 1/2 hrs. with no problems. Other than the heater core ?
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I drained all the coolant from the radiator and engine. After I fill up and bleed the air from the system. I'm very sure no air inside the engine. The next day I found have air gurgling inside the heater core. Look like have a small leak but I check all the engine, host and radiator no leaks. The last think to think is heater core and heater core host. How can I check both parts? If they leak. How hard to change? Can I DIY?
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I just bought a used 98 Acura 3.0CL. I've noticed that when the heat is cranked, it doesn't blow hot at all. I did some quick research and came up with two answers thus far; check the antifreeze coolant and that I may need to replace the heater control valve. Am I "warm" on the area?
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I have a 2000 F-150 5.4L 4x4. I am currently deployed and my wife has the truck. Just yesterday she told me my heater core went out again the only way she knows this is its the 4th time in just over a year. What would cause a heater core to go out so many times in a short period? What should I have my wife do? I do not want to get rid of my truck and I wont be back for another few months.
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2005 Ford E Series heater core is "always on"?
That is, coolant always circulate through the core, there is no "valve" that turns it on or off.
The HOT / COLD dial opens and closes a door (vacuum operated) that allow air to enter the heater core area?
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